package com.servlet;

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class Demo01Servlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println(123);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        super.doPost(req, resp);
    }

    @Override
    public void init(ServletConfig config) throws ServletException {
        System.out.println(config.getServletName());
        System.out.println(config.getInitParameter("username"));
        ServletContext servletContext = config.getServletContext();
        servletContext.setAttribute("username", "root");
        Object username = servletContext.getAttribute("username");
        System.out.println(username);


    }
}
